The Class-B push-pull amplifier is an efficient two-transistor circuit, in which the two transistors operate in the following way

• A. Both transistors operate in the active region throughout the negative ac cycle
• B. Both transistors operate in the active region for more than half-cycle but less than a whole cycle
• C. One transistor conducts during the positive half-cycle and the other during the negative half-cycle
• D. Full supply voltage appears across each of the transistors